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(Received for publication, June 9, 1994; and in revised form, October 12,
1994) The mouse 8.5 mRNA encodes a 171-residue novel protein which
displays a highly significant similarity with the product of the
previously characterized neuronal p1A75 cDNA (Sutcliffe, J. G., Milner,
R. J., Shinnick, T. M., and Bloom, F. E.(1983) Cell 33,
671-682). Northern blot and in situ hybridization
experiments indicated that the 8.5 mRNA is specifically expressed in
neural and neuroendocrine tissues. An affinity-purified antibody
directed against the recombinant 8.5 protein demonstrated the existence
of the 19-kDa natural protein in brain and evidenced its prominent
juxtanuclear Golgi-like localization in cultured neurons.
Ultrastructural analysis of the same preparation revealed a specific
labeling of all the Golgi saccules and of some vesicles in the Golgi
zone. In transfected COS cells, the exogenous protein was also detected
in the Golgi area, indicating, therefore, the presence of a Golgi
targeting signal in its primary sequence.
Volume 270,
Number 4,
Issue of January 27, 1995 pp. 1888-1893
©1995 by The American Society for Biochemistry and Molecular Biology, Inc.
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